The kids in Konoha like Naruto would probably be very excited. They love new and different things, and Harry with his magic would be really cool to them.
Well, he might introduce magic from the wizarding world to the ninjas. For example, he could show them spells like Wingardium Leviosa and they might be amazed at how different it is from their chakra - based jutsu.
Her magic would probably be seen as something very strange and powerful. The ninja in Konoha are used to chakra - based abilities, so her spells and potions would be completely new to them. Some might be in awe of her magic, while others might be a bit scared, thinking it could be a threat.
Well, the plot could involve her arriving in Konoha and being mistaken for a strange new ninja. She might use her magic in unexpected ways that both amaze and confuse the Konoha residents. Maybe she teams up with Naruto and his friends to fight against a new threat that is both magical and ninja - related.
He might use his magic skills to stand out. For example, his ability to perform spells could be seen as a unique talent in Konoha. His shop could become a place where ninjas are curious to visit and learn about different kinds of magic.
The plot could involve Harry finding out that there are magical elements in Konoha that are different from what he knows in Hogwarts. He could be introduced to chakra and start to study it alongside his own magic. Maybe he gets involved in the Chunin Exams, using his magic to compete in a unique way. He might also encounter some dark wizards who have made their way to Konoha, leading to an epic battle to protect the village.
He might meet international aurors. These are highly skilled wizards from different countries who are experts in dark wizard catching. They could teach Harry some new combat spells.
He could meet Fleur Delacour's family. Since Fleur is from France, her family might be an important part of the French wizarding community that Harry interacts with.
Hermione would be a likely companion. She loves learning and exploring, so she'd be eager to go on a traveling adventure with Harry. Ron might also tag along, especially if there's a chance of food and adventure. Neville could be another option. He has grown a lot in courage and his knowledge of plants could come in handy in different magical environments. Luna Lovegood would be a very interesting companion too. Her unique perspective on magic and the world would add a lot of fun and mystery to the journey.